Finding the Third Proportional to 228,860 and 478,646

Step by Step Solution

1. Step 1: Write the proportion equation
   228,860 : 478,646 = 478,646 : x
2. Step 2: Convert to fraction form
   228,860/478,646 = 478,646/x
3. Step 3: Cross multiply
   228,860x = 478,646 × 478,646
4. Step 4: Simplify right side
   228,860x = 229,101,993,316
5. Step 5: Solve for x
   x = 229,101,993,316/228,860
6. Step 6: Final answer
   x = 1,001,057.39